$ git clone -n https://src.fedoraproject.org/rpms/rust-async-channel.git /var/lib/mock/f41-build-60964676-6586805/root/chroot_tmpdir/scmroot/rust-async-channel
Cloning into '/var/lib/mock/f41-build-60964676-6586805/root/chroot_tmpdir/scmroot/rust-async-channel'...
$ git fetch origin 94265e2d52a416559ae781a74f1a3b03237d060d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-channel
 * [new ref]         94265e2d52a416559ae781a74f1a3b03237d060d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 94265e2 Update to version 2.5.0; Fixes RHBZ#2376158