$ git clone -n https://src.fedoraproject.org/rpms/perl-Bencode.git /var/lib/mock/f45-build-21878-588/root/chroot_tmpdir/scmroot/perl-Bencode
Cloning into '/var/lib/mock/f45-build-21878-588/root/chroot_tmpdir/scmroot/perl-Bencode'...
$ git fetch origin c47a540d0a2eaec016447b2f166cced49711629b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Bencode
 * [new ref]         c47a540d0a2eaec016447b2f166cced49711629b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c47a540 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild