$ git clone -n https://src.fedoraproject.org/rpms/mingw-python-pyyaml.git /var/lib/mock/f45-build-18702-526/root/chroot_tmpdir/scmroot/mingw-python-pyyaml
Cloning into '/var/lib/mock/f45-build-18702-526/root/chroot_tmpdir/scmroot/mingw-python-pyyaml'...
$ git fetch origin c66f50e11005c98a1134ceeb9f3f058c534f3e6c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-python-pyyaml
 * [new ref]         c66f50e11005c98a1134ceeb9f3f058c534f3e6c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c66f50e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild