$ git clone -n https://src.fedoraproject.org/rpms/gambit-c.git /var/lib/mock/f42-build-side-1-3589356-46957/root/chroot_tmpdir/scmroot/gambit-c
Cloning into '/var/lib/mock/f42-build-side-1-3589356-46957/root/chroot_tmpdir/scmroot/gambit-c'...
$ git fetch origin b9d1d3a0f926077bada0a0708088427c883358a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gambit-c
 * [new ref]         b9d1d3a0f926077bada0a0708088427c883358a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9d1d3a Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild