$ git clone -n https://src.fedoraproject.org/rpms/kf5-kiconthemes.git /var/lib/mock/f38-build-712617-94383/root/chroot_tmpdir/scmroot/kf5-kiconthemes
Cloning into '/var/lib/mock/f38-build-712617-94383/root/chroot_tmpdir/scmroot/kf5-kiconthemes'...
$ git fetch origin 91c8ecf8bd5316e48a4de57bfcb1436e19b162f3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kiconthemes
 * [new ref]         91c8ecf8bd5316e48a4de57bfcb1436e19b162f3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91c8ecf 5.105.0