$ git clone -n https://src.fedoraproject.org/rpms/libgravatar.git /var/lib/mock/f42-build-872041-177853/root/chroot_tmpdir/scmroot/libgravatar
Cloning into '/var/lib/mock/f42-build-872041-177853/root/chroot_tmpdir/scmroot/libgravatar'...
$ git fetch origin 2880210dfdabd4babdb80ba0df4ee6c4ddaf8b2c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgravatar
 * [new ref]         2880210dfdabd4babdb80ba0df4ee6c4ddaf8b2c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2880210 24.12.2