$ git clone -n https://src.fedoraproject.org/rpms/mingw-libmng.git /var/lib/mock/f45-build-18558-521/root/chroot_tmpdir/scmroot/mingw-libmng
Cloning into '/var/lib/mock/f45-build-18558-521/root/chroot_tmpdir/scmroot/mingw-libmng'...
$ git fetch origin 3007d3f8a21158fc2bbcbc69b2f4d39f03fde4fc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-libmng
 * [new ref]         3007d3f8a21158fc2bbcbc69b2f4d39f03fde4fc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3007d3f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild