$ git clone -n https://src.fedoraproject.org/rpms/python-standard-mailcap.git /var/lib/mock/f45-build-33174-667/root/chroot_tmpdir/scmroot/python-standard-mailcap
Cloning into '/var/lib/mock/f45-build-33174-667/root/chroot_tmpdir/scmroot/python-standard-mailcap'...
$ git fetch origin 5a99a65365ffce24761a895384eaaebae137ba80:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-standard-mailcap
 * [new ref]         5a99a65365ffce24761a895384eaaebae137ba80 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a99a65 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild