$ git clone -n https://src.fedoraproject.org/rpms/rust-pangocairo-sys.git /var/lib/mock/f42-build-side-1-3581433-46829/root/chroot_tmpdir/scmroot/rust-pangocairo-sys
Cloning into '/var/lib/mock/f42-build-side-1-3581433-46829/root/chroot_tmpdir/scmroot/rust-pangocairo-sys'...
$ git fetch origin 0f38e4ad4e5939411bce2f24d4894bb478bbdc62:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pangocairo-sys
 * [new ref]         0f38e4ad4e5939411bce2f24d4894bb478bbdc62 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f38e4a Update to version 0.20.10; Fixes RHBZ#2365877