$ git clone -n https://src.fedoraproject.org/rpms/gssproxy.git /var/lib/mock/f40-build-2209843-52168/root/chroot_tmpdir/scmroot/gssproxy
Cloning into '/var/lib/mock/f40-build-2209843-52168/root/chroot_tmpdir/scmroot/gssproxy'...
$ git fetch origin eec64d8edd4a53e6f9a30de1bea025ee4fe4c9af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gssproxy
 * [new ref]         eec64d8edd4a53e6f9a30de1bea025ee4fe4c9af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eec64d8 Update to 0.9.2