$ git clone -n https://src.fedoraproject.org/rpms/qsynth.git /var/lib/mock/f39-build-1530789-36198/root/chroot_tmpdir/scmroot/qsynth
Cloning into '/var/lib/mock/f39-build-1530789-36198/root/chroot_tmpdir/scmroot/qsynth'...
$ git fetch origin 3888a0fc3d52bae50440f6adf6e5605b218374da:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qsynth
 * [new ref]         3888a0fc3d52bae50440f6adf6e5605b218374da -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3888a0f Update to version 0.9.12