$ git clone -n https://src.fedoraproject.org/rpms/rust-glib.git /var/lib/mock/f40-build-2706990-71245/root/chroot_tmpdir/scmroot/rust-glib
Cloning into '/var/lib/mock/f40-build-2706990-71245/root/chroot_tmpdir/scmroot/rust-glib'...
$ git fetch origin d2f944aebdd8217795dab1769418fde42dea7fc2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-glib
 * [new ref]         d2f944aebdd8217795dab1769418fde42dea7fc2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2f944a Backport upstreamed patch to fix UB in VariantStr::impl_get