$ git clone -n https://src.fedoraproject.org/rpms/rust-serdect0.2.git /var/lib/mock/f45-build-44854-818/root/chroot_tmpdir/scmroot/rust-serdect0.2
Cloning into '/var/lib/mock/f45-build-44854-818/root/chroot_tmpdir/scmroot/rust-serdect0.2'...
$ git fetch origin 05bded07192504fb8f593bab8338c5b337c0c709:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serdect0.2
 * [new ref]         05bded07192504fb8f593bab8338c5b337c0c709 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05bded0 Initial compat package