$ git clone -n https://src.fedoraproject.org/rpms/libserializer.git /var/lib/mock/f40-build-2008377-45368/root/chroot_tmpdir/scmroot/libserializer
Cloning into '/var/lib/mock/f40-build-2008377-45368/root/chroot_tmpdir/scmroot/libserializer'...
$ git fetch origin 88081bf3a9558c190701d9835f2927c3957fa584:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libserializer
 * [new ref]         88081bf3a9558c190701d9835f2927c3957fa584 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88081bf Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild