$ git clone -n https://src.fedoraproject.org/rpms/kf5-kpackage.git /var/lib/mock/f39-build-1562289-37430/root/chroot_tmpdir/scmroot/kf5-kpackage
Cloning into '/var/lib/mock/f39-build-1562289-37430/root/chroot_tmpdir/scmroot/kf5-kpackage'...
$ git fetch origin 1c99d7a6969593550068aa80e2825a07ad8810e7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kpackage
 * [new ref]         1c99d7a6969593550068aa80e2825a07ad8810e7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c99d7a 5.111.0