$ git clone -n https://src.fedoraproject.org/rpms/glaxium.git /var/lib/mock/f41-build-735327-13228/root/chroot_tmpdir/scmroot/glaxium
Cloning into '/var/lib/mock/f41-build-735327-13228/root/chroot_tmpdir/scmroot/glaxium'...
$ git fetch origin 8142b240b3688553dbd570731cea3e573a72aa3f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glaxium
 * [new ref]         8142b240b3688553dbd570731cea3e573a72aa3f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8142b24 Eliminate use of obsolete %patchN syntax (#2283636)