$ git clone -n https://src.fedoraproject.org/rpms/texlive-collection-bibtexextra.git /var/lib/mock/f45-build-36952-709/root/chroot_tmpdir/scmroot/texlive-collection-bibtexextra
Cloning into '/var/lib/mock/f45-build-36952-709/root/chroot_tmpdir/scmroot/texlive-collection-bibtexextra'...
$ git fetch origin 6213bab8060368d578ae0f4144ed1f7ab296ddf7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/texlive-collection-bibtexextra
 * [new ref]         6213bab8060368d578ae0f4144ed1f7ab296ddf7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6213bab Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild