$ git clone -n https://src.fedoraproject.org/rpms/rust-gdk-pixbuf-sys.git /var/lib/mock/f40-build-2122844-50746/root/chroot_tmpdir/scmroot/rust-gdk-pixbuf-sys
Cloning into '/var/lib/mock/f40-build-2122844-50746/root/chroot_tmpdir/scmroot/rust-gdk-pixbuf-sys'...
$ git fetch origin 465827a3405b2b50dc3a94a187af48bec14228a5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gdk-pixbuf-sys
 * [new ref]         465827a3405b2b50dc3a94a187af48bec14228a5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 465827a Update to version 0.18.0; Fixes RHBZ#2224905