$ git clone -n https://src.fedoraproject.org/rpms/zpaq.git /var/lib/mock/f45-build-39379-734/root/chroot_tmpdir/scmroot/zpaq
Cloning into '/var/lib/mock/f45-build-39379-734/root/chroot_tmpdir/scmroot/zpaq'...
$ git fetch origin 4e3ee22d72eaf21cccb722e88a2d36ed5f3f46e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zpaq
 * [new ref]         4e3ee22d72eaf21cccb722e88a2d36ed5f3f46e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e3ee22 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild