$ git clone -n https://src.fedoraproject.org/rpms/rust-clap_lex.git /var/lib/mock/f41-build-side-114697-60950348-6586689/root/chroot_tmpdir/scmroot/rust-clap_lex
Cloning into '/var/lib/mock/f41-build-side-114697-60950348-6586689/root/chroot_tmpdir/scmroot/rust-clap_lex'...
$ git fetch origin 042243a08e507ea041cf2cbd516cb4a9b7748d93:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-clap_lex
 * [new ref]         042243a08e507ea041cf2cbd516cb4a9b7748d93 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 042243a Update to version 0.7.5; Fixes RHBZ#2371282