$ git clone -n https://src.fedoraproject.org/rpms/perl-BibTeX-Parser.git /var/lib/mock/f45-build-21885-588/root/chroot_tmpdir/scmroot/perl-BibTeX-Parser
Cloning into '/var/lib/mock/f45-build-21885-588/root/chroot_tmpdir/scmroot/perl-BibTeX-Parser'...
$ git fetch origin 748fc81c1d1ba18b06cf47d017dcb36311b5b19e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-BibTeX-Parser
 * [new ref]         748fc81c1d1ba18b06cf47d017dcb36311b5b19e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 748fc81 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild