$ git clone -n https://src.fedoraproject.org/rpms/alligator.git /var/lib/mock/f40-build-2208583-52141/root/chroot_tmpdir/scmroot/alligator
Cloning into '/var/lib/mock/f40-build-2208583-52141/root/chroot_tmpdir/scmroot/alligator'...
$ git fetch origin 8dca79d378b96d8b7e27be1747008c3e365d2cfe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/alligator
 * [new ref]         8dca79d378b96d8b7e27be1747008c3e365d2cfe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8dca79d 24.01.85