$ git clone -n https://src.fedoraproject.org/rpms/rust-smallvec.git /var/lib/mock/f40-build-2716714-72676/root/chroot_tmpdir/scmroot/rust-smallvec
Cloning into '/var/lib/mock/f40-build-2716714-72676/root/chroot_tmpdir/scmroot/rust-smallvec'...
$ git fetch origin 932a94c613c9d2bbe3d8080776185d070adda4b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-smallvec
 * [new ref]         932a94c613c9d2bbe3d8080776185d070adda4b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 932a94c Update to version 1.13.2