$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-tag-sys.git /var/lib/mock/f45-build-42236-791/root/chroot_tmpdir/scmroot/rust-gstreamer-tag-sys
Cloning into '/var/lib/mock/f45-build-42236-791/root/chroot_tmpdir/scmroot/rust-gstreamer-tag-sys'...
$ git fetch origin 2dd6a04b8fb4c0c646a608108d11838c91c99fec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-tag-sys
 * [new ref]         2dd6a04b8fb4c0c646a608108d11838c91c99fec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2dd6a04 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild