$ git clone -n https://src.fedoraproject.org/rpms/perl-L.git /var/lib/mock/f45-build-24322-603/root/chroot_tmpdir/scmroot/perl-L
Cloning into '/var/lib/mock/f45-build-24322-603/root/chroot_tmpdir/scmroot/perl-L'...
$ git fetch origin 81641aead4481c69d6866481ed0f9e6a0c97e1e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-L
 * [new ref]         81641aead4481c69d6866481ed0f9e6a0c97e1e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81641ae Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild