$ git clone -n https://src.fedoraproject.org/rpms/kmag.git /var/lib/mock/f45-build-15252-471/root/chroot_tmpdir/scmroot/kmag
Cloning into '/var/lib/mock/f45-build-15252-471/root/chroot_tmpdir/scmroot/kmag'...
$ git fetch origin 1669528cac492e8e0853d0ecb3d9c577612f632e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kmag
 * [new ref]         1669528cac492e8e0853d0ecb3d9c577612f632e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1669528 26.08.1