$ git clone -n https://src.fedoraproject.org/rpms/perl-Palm-PDB.git /var/lib/mock/f45-build-25613-612/root/chroot_tmpdir/scmroot/perl-Palm-PDB
Cloning into '/var/lib/mock/f45-build-25613-612/root/chroot_tmpdir/scmroot/perl-Palm-PDB'...
$ git fetch origin ef6c53f3ab8783487086a5904eb21f3ec894f6fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Palm-PDB
 * [new ref]         ef6c53f3ab8783487086a5904eb21f3ec894f6fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef6c53f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild