$ git clone -n https://src.fedoraproject.org/rpms/rust-ironrdp-input.git /var/lib/mock/f42-build-3270382-41264/root/chroot_tmpdir/scmroot/rust-ironrdp-input
Cloning into '/var/lib/mock/f42-build-3270382-41264/root/chroot_tmpdir/scmroot/rust-ironrdp-input'...
$ git fetch origin b864e878931c45c4b83a889c2847f7996dbb8949:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ironrdp-input
 * [new ref]         b864e878931c45c4b83a889c2847f7996dbb8949 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b864e87 Initial packaging, fixes rhbz#2329152