$ git clone -n https://src.fedoraproject.org/rpms/rust-glib0.17.git /var/lib/mock/f40-build-2689046-68103/root/chroot_tmpdir/scmroot/rust-glib0.17
Cloning into '/var/lib/mock/f40-build-2689046-68103/root/chroot_tmpdir/scmroot/rust-glib0.17'...
$ git fetch origin bed214d2e544c0240373e659f10674f94ac8fab8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-glib0.17
 * [new ref]         bed214d2e544c0240373e659f10674f94ac8fab8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bed214d Backport upstreamed patch to fix UB in VariantStr::impl_get