$ git clone -n https://src.fedoraproject.org/rpms/rust-gsk4-sys.git /var/lib/mock/f39-build-1581414-38087/root/chroot_tmpdir/scmroot/rust-gsk4-sys
Cloning into '/var/lib/mock/f39-build-1581414-38087/root/chroot_tmpdir/scmroot/rust-gsk4-sys'...
$ git fetch origin 833ed64fa9be345b0c16e0acfc18fa0d675619b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gsk4-sys
 * [new ref]         833ed64fa9be345b0c16e0acfc18fa0d675619b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 833ed64 Update to version 0.7.3; Fixes RHBZ#2240343