$ git clone -n https://src.fedoraproject.org/rpms/mingw-cairomm.git /var/lib/mock/f45-build-18400-515/root/chroot_tmpdir/scmroot/mingw-cairomm
Cloning into '/var/lib/mock/f45-build-18400-515/root/chroot_tmpdir/scmroot/mingw-cairomm'...
$ git fetch origin 159bc0e328c6be76c9d1880bc6b357b88d782fea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-cairomm
 * [new ref]         159bc0e328c6be76c9d1880bc6b357b88d782fea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 159bc0e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild