$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-revision.git /var/lib/mock/f40-build-2497213-61664/root/chroot_tmpdir/scmroot/rust-gix-revision
Cloning into '/var/lib/mock/f40-build-2497213-61664/root/chroot_tmpdir/scmroot/rust-gix-revision'...
$ git fetch origin 4f9b315367a4c320839fa6e4d2e036d8315fc151:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-revision
 * [new ref]         4f9b315367a4c320839fa6e4d2e036d8315fc151 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f9b315 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild