$ git clone -n https://src.fedoraproject.org/rpms/rust-local-encoding.git /var/lib/mock/f41-build-side-1-2992829-36016/root/chroot_tmpdir/scmroot/rust-local-encoding
Cloning into '/var/lib/mock/f41-build-side-1-2992829-36016/root/chroot_tmpdir/scmroot/rust-local-encoding'...
$ git fetch origin 01770e91ea88facb01060830001f2c1fce2ece32:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-local-encoding
 * [new ref]         01770e91ea88facb01060830001f2c1fce2ece32 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 01770e9 unused leaf package for more than two release cycles