$ git clone -n https://src.fedoraproject.org/rpms/xfce4-terminal.git /var/lib/mock/f39-build-1848763-42187/root/chroot_tmpdir/scmroot/xfce4-terminal
Cloning into '/var/lib/mock/f39-build-1848763-42187/root/chroot_tmpdir/scmroot/xfce4-terminal'...
$ git fetch origin b56f1c762ca5d2550469643e632835040b8d6593:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce4-terminal
 * [new ref]         b56f1c762ca5d2550469643e632835040b8d6593 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b56f1c7 Update to v1.1.1