$ git clone -n https://src.fedoraproject.org/rpms/yp-tools.git /var/lib/mock/f45-build-39294-733/root/chroot_tmpdir/scmroot/yp-tools
Cloning into '/var/lib/mock/f45-build-39294-733/root/chroot_tmpdir/scmroot/yp-tools'...
$ git fetch origin 612f54c61c11b35f06361e5debaabf7c4362885f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/yp-tools
 * [new ref]         612f54c61c11b35f06361e5debaabf7c4362885f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 612f54c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild