$ git clone -n https://src.fedoraproject.org/rpms/libwacom.git /var/lib/mock/f39-build-1857058-42431/root/chroot_tmpdir/scmroot/libwacom
Cloning into '/var/lib/mock/f39-build-1857058-42431/root/chroot_tmpdir/scmroot/libwacom'...
$ git fetch origin f50bf3b26d7b4440abab6152059f3df623a23b8b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libwacom
 * [new ref]         f50bf3b26d7b4440abab6152059f3df623a23b8b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f50bf3b libwacom 2.9.0