$ git clone -n https://src.fedoraproject.org/rpms/rust-pangocairo-sys.git /var/lib/mock/f45-build-43700-805/root/chroot_tmpdir/scmroot/rust-pangocairo-sys
Cloning into '/var/lib/mock/f45-build-43700-805/root/chroot_tmpdir/scmroot/rust-pangocairo-sys'...
$ git fetch origin b23fecd0ff39fd4f7bb55d15d609160a1a67ddb9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pangocairo-sys
 * [new ref]         b23fecd0ff39fd4f7bb55d15d609160a1a67ddb9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b23fecd Update to version 0.22.9; Fixes RHBZ#2526054