$ git clone -n https://src.fedoraproject.org/rpms/python-fsleyes.git /var/lib/mock/f42-build-3486944-45831/root/chroot_tmpdir/scmroot/python-fsleyes
Cloning into '/var/lib/mock/f42-build-3486944-45831/root/chroot_tmpdir/scmroot/python-fsleyes'...
$ git fetch origin cc950042fab2ccb0b6ab310cd9b9a5d9863a7775:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-fsleyes
 * [new ref]         cc950042fab2ccb0b6ab310cd9b9a5d9863a7775 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc95004 Update to 1.14.2 upstream release