$ git clone -n https://src.fedoraproject.org/rpms/pygsl.git /var/lib/mock/f40-build-735434-106388/root/chroot_tmpdir/scmroot/pygsl
Cloning into '/var/lib/mock/f40-build-735434-106388/root/chroot_tmpdir/scmroot/pygsl'...
$ git fetch origin f9a5e70a5983accc461aff2724e9f9759b49d35b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pygsl
 * [new ref]         f9a5e70a5983accc461aff2724e9f9759b49d35b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9a5e70 Update to 2.3.3