$ git clone -n https://src.fedoraproject.org/rpms/rust-bigdecimal.git /var/lib/mock/epel9-build-59124174-6571235/root/chroot_tmpdir/scmroot/rust-bigdecimal
Cloning into '/var/lib/mock/epel9-build-59124174-6571235/root/chroot_tmpdir/scmroot/rust-bigdecimal'...
$ git fetch origin b275d93572d36222d01dfa0cf4818e4efdc99141:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bigdecimal
 * [new ref]         b275d93572d36222d01dfa0cf4818e4efdc99141 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b275d93 Update to version 0.4.8; Fixes RHBZ#2356500