$ git clone -n https://src.fedoraproject.org/rpms/rust-sha1-asm.git /var/lib/mock/f38-build-side-42-init-devel-1396433-31050/root/chroot_tmpdir/scmroot/rust-sha1-asm
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1396433-31050/root/chroot_tmpdir/scmroot/rust-sha1-asm'...
$ git fetch origin 9f00ab034dddbde883da193af905efa8623ac250:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sha1-asm
 * [new ref]         9f00ab034dddbde883da193af905efa8623ac250 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f00ab0 Initial import (#2223624)