$ git clone -n https://src.fedoraproject.org/rpms/libwacom.git /var/lib/mock/f39-build-1597737-38461/root/chroot_tmpdir/scmroot/libwacom
Cloning into '/var/lib/mock/f39-build-1597737-38461/root/chroot_tmpdir/scmroot/libwacom'...
$ git fetch origin 619c3a1488d4615e929f3be5e5fcbe4b86f29c26:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libwacom
 * [new ref]         619c3a1488d4615e929f3be5e5fcbe4b86f29c26 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 619c3a1 libwacom 2.8.0