$ git clone -n https://src.fedoraproject.org/rpms/showtime.git /var/lib/mock/f42-build-side-1-3497610-45961/root/chroot_tmpdir/scmroot/showtime
Cloning into '/var/lib/mock/f42-build-side-1-3497610-45961/root/chroot_tmpdir/scmroot/showtime'...
$ git fetch origin 9c007511a500802ccf873c915d180a7ed57ee087:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/showtime
 * [new ref]         9c007511a500802ccf873c915d180a7ed57ee087 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c00751 Add FIXME and warning comment regarding package version