$ git clone -n https://src.fedoraproject.org/rpms/gjs.git /var/lib/mock/f41-build-858186-168322/root/chroot_tmpdir/scmroot/gjs
Cloning into '/var/lib/mock/f41-build-858186-168322/root/chroot_tmpdir/scmroot/gjs'...
$ git fetch origin 3398ee5bab3f1360e3582a404dd5a455e31cb3b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gjs
 * [new ref]         3398ee5bab3f1360e3582a404dd5a455e31cb3b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3398ee5 Backport MR #955 to fix user switch crasher (#2319028)