$ git clone -n https://src.fedoraproject.org/rpms/rust-sval.git /var/lib/mock/f41-build-side-1-3134934-39764/root/chroot_tmpdir/scmroot/rust-sval
Cloning into '/var/lib/mock/f41-build-side-1-3134934-39764/root/chroot_tmpdir/scmroot/rust-sval'...
$ git fetch origin eb36d54b4cd289d164bfb2fc0732887caf9da85b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval
 * [new ref]         eb36d54b4cd289d164bfb2fc0732887caf9da85b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eb36d54 no longer needed