$ git clone -n https://src.fedoraproject.org/rpms/mathic.git /var/lib/mock/f45-build-18110-508/root/chroot_tmpdir/scmroot/mathic
Cloning into '/var/lib/mock/f45-build-18110-508/root/chroot_tmpdir/scmroot/mathic'...
$ git fetch origin 626f93f50ab51612247642f23597c41da7176b57:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mathic
 * [new ref]         626f93f50ab51612247642f23597c41da7176b57 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 626f93f Version 1.5