$ git clone -n https://src.fedoraproject.org/rpms/photoqt.git /var/lib/mock/f41-build-815543-149582/root/chroot_tmpdir/scmroot/photoqt
Cloning into '/var/lib/mock/f41-build-815543-149582/root/chroot_tmpdir/scmroot/photoqt'...
$ git fetch origin 5e71f400eed593ec2725ec5cab19041e40765dd0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/photoqt
 * [new ref]         5e71f400eed593ec2725ec5cab19041e40765dd0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e71f40 Udpate to 4.5