$ git clone -n https://src.fedoraproject.org/rpms/rust-routinator-ui.git /var/lib/mock/f40-build-795607-140206/root/chroot_tmpdir/scmroot/rust-routinator-ui
Cloning into '/var/lib/mock/f40-build-795607-140206/root/chroot_tmpdir/scmroot/rust-routinator-ui'...
$ git fetch origin f676d869c022fefbbc5250957c6fee493c11c8e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-routinator-ui
 * [new ref]         f676d869c022fefbbc5250957c6fee493c11c8e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f676d86 Initial package (rhbz#2259939)