$ git clone -n https://src.fedoraproject.org/rpms/rust-pangocairo-sys.git /var/lib/mock/f39-build-1526493-36072/root/chroot_tmpdir/scmroot/rust-pangocairo-sys
Cloning into '/var/lib/mock/f39-build-1526493-36072/root/chroot_tmpdir/scmroot/rust-pangocairo-sys'...
$ git fetch origin 6f0900d7a46c0aa381c1ebd5f6d5c148d3aa814c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pangocairo-sys
 * [new ref]         6f0900d7a46c0aa381c1ebd5f6d5c148d3aa814c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f0900d Update to version 0.18.0; Fixes RHBZ#2224917