$ git clone -n https://src.fedoraproject.org/rpms/free42.git /var/lib/mock/f40-build-801693-143849/root/chroot_tmpdir/scmroot/free42
Cloning into '/var/lib/mock/f40-build-801693-143849/root/chroot_tmpdir/scmroot/free42'...
$ git fetch origin 94db0881e1702716c8d14e6c1e4173f955fbe54b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/free42
 * [new ref]         94db0881e1702716c8d14e6c1e4173f955fbe54b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 94db088 Update to 3.1.5