$ git clone -n https://src.fedoraproject.org/rpms/sipcalc.git /var/lib/mock/f41-build-829085-155963/root/chroot_tmpdir/scmroot/sipcalc
Cloning into '/var/lib/mock/f41-build-829085-155963/root/chroot_tmpdir/scmroot/sipcalc'...
$ git fetch origin f38feb2ee9331ece27effb6daa8ba40458c01264:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sipcalc
 * [new ref]         f38feb2ee9331ece27effb6daa8ba40458c01264 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f38feb2 adding automake dependency