$ git clone -n https://src.fedoraproject.org/rpms/perl-Sane.git /var/lib/mock/f39-build-1547648-36733/root/chroot_tmpdir/scmroot/perl-Sane
Cloning into '/var/lib/mock/f39-build-1547648-36733/root/chroot_tmpdir/scmroot/perl-Sane'...
$ git fetch origin c1c2f6cab18e535a9c9a0bdfb256f42ab388c2cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sane
 * [new ref]         c1c2f6cab18e535a9c9a0bdfb256f42ab388c2cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1c2f6c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild