$ git clone -n https://src.fedoraproject.org/rpms/mumble.git /var/lib/mock/f41-build-829680-156166/root/chroot_tmpdir/scmroot/mumble
Cloning into '/var/lib/mock/f41-build-829680-156166/root/chroot_tmpdir/scmroot/mumble'...
$ git fetch origin 98a9263fdda595110f7250c7d4c773e328171310:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mumble
 * [new ref]         98a9263fdda595110f7250c7d4c773e328171310 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 98a9263 Rebuilt for poco 1.13.3 rhbz#2274227 rhbz#2276278