$ git clone -n https://src.fedoraproject.org/rpms/rust-gufo-xmp.git /var/lib/mock/f45-build-42203-791/root/chroot_tmpdir/scmroot/rust-gufo-xmp
Cloning into '/var/lib/mock/f45-build-42203-791/root/chroot_tmpdir/scmroot/rust-gufo-xmp'...
$ git fetch origin b039fee2efe9132da467859e06187164297bfe1a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gufo-xmp
 * [new ref]         b039fee2efe9132da467859e06187164297bfe1a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b039fee Update to version 0.5.0; Fixes RHBZ#2529506