$ git clone -n https://src.fedoraproject.org/rpms/kf5-libksane.git /var/lib/mock/f39-build-2063441-49184/root/chroot_tmpdir/scmroot/kf5-libksane
Cloning into '/var/lib/mock/f39-build-2063441-49184/root/chroot_tmpdir/scmroot/kf5-libksane'...
$ git fetch origin 77d39a9b5b023065f112b884fa5783e2f6a9c0e5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-libksane
 * [new ref]         77d39a9b5b023065f112b884fa5783e2f6a9c0e5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 77d39a9 23.08.4