$ git clone -n https://src.fedoraproject.org/rpms/mingw-libpng.git /var/lib/mock/f45-build-18565-521/root/chroot_tmpdir/scmroot/mingw-libpng
Cloning into '/var/lib/mock/f45-build-18565-521/root/chroot_tmpdir/scmroot/mingw-libpng'...
$ git fetch origin 1f49d6cc8bd1babc9dbd443e4abec3b39303072d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-libpng
 * [new ref]         1f49d6cc8bd1babc9dbd443e4abec3b39303072d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f49d6c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild