$ git clone -n https://src.fedoraproject.org/rpms/qjackctl.git /var/lib/mock/f39-build-1565454-37572/root/chroot_tmpdir/scmroot/qjackctl
Cloning into '/var/lib/mock/f39-build-1565454-37572/root/chroot_tmpdir/scmroot/qjackctl'...
$ git fetch origin 918e4d4252df9d84a4b1709d8a6ea1b0d2882779:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qjackctl
 * [new ref]         918e4d4252df9d84a4b1709d8a6ea1b0d2882779 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 918e4d4 Update to version 0.9.12