$ git clone -n https://src.fedoraproject.org/rpms/libvirt-dbus.git /var/lib/mock/f39-build-1540398-36472/root/chroot_tmpdir/scmroot/libvirt-dbus
Cloning into '/var/lib/mock/f39-build-1540398-36472/root/chroot_tmpdir/scmroot/libvirt-dbus'...
$ git fetch origin a5d7ebee2cb004b2d9ddbf94df0521ea84422fdf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libvirt-dbus
 * [new ref]         a5d7ebee2cb004b2d9ddbf94df0521ea84422fdf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a5d7ebe BR systemd, which enables systemd services to be built