$ git clone -n https://src.fedoraproject.org/rpms/rust-libz-sys.git /var/lib/mock/f38-build-side-42-init-devel-1394002-31050/root/chroot_tmpdir/scmroot/rust-libz-sys
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1394002-31050/root/chroot_tmpdir/scmroot/rust-libz-sys'...
$ git fetch origin b002825f28966905b0224f9649d0e6f05c491275:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libz-sys
 * [new ref]         b002825f28966905b0224f9649d0e6f05c491275 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b002825 Update to version 1.1.12; Fixes RHBZ#2224862