$ git clone -n https://src.fedoraproject.org/rpms/rust-async-signal.git /var/lib/mock/f40-build-2053677-49096/root/chroot_tmpdir/scmroot/rust-async-signal
Cloning into '/var/lib/mock/f40-build-2053677-49096/root/chroot_tmpdir/scmroot/rust-async-signal'...
$ git fetch origin c5faf09f574ba04d43f1d34c406ffc591e16980d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-signal
 * [new ref]         c5faf09f574ba04d43f1d34c406ffc591e16980d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5faf09 Initial import (#2242779)