$ git clone -n https://src.fedoraproject.org/rpms/rubygem-activerecord.git /var/lib/mock/f39-build-1778569-41532/root/chroot_tmpdir/scmroot/rubygem-activerecord
Cloning into '/var/lib/mock/f39-build-1778569-41532/root/chroot_tmpdir/scmroot/rubygem-activerecord'...
$ git fetch origin b2ab5b15801abe8cdd661ef6f4cb3e9a2540b32f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-activerecord
 * [new ref]         b2ab5b15801abe8cdd661ef6f4cb3e9a2540b32f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2ab5b1 Update to activerecord 7.0.8