$ git clone -n https://src.fedoraproject.org/rpms/angelfish.git /var/lib/mock/f40-build-774244-127655/root/chroot_tmpdir/scmroot/angelfish
Cloning into '/var/lib/mock/f40-build-774244-127655/root/chroot_tmpdir/scmroot/angelfish'...
$ git fetch origin add2b58812a1bae78536da538e6a2209bd7f31d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/angelfish
 * [new ref]         add2b58812a1bae78536da538e6a2209bd7f31d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at add2b58 24.01.90