$ git clone -n https://src.fedoraproject.org/rpms/rust-libblkid-rs-sys.git /var/lib/mock/f45-build-42911-797/root/chroot_tmpdir/scmroot/rust-libblkid-rs-sys
Cloning into '/var/lib/mock/f45-build-42911-797/root/chroot_tmpdir/scmroot/rust-libblkid-rs-sys'...
$ git fetch origin df3643cbeca9aa8191088f95c4c27c5f4239a48a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libblkid-rs-sys
 * [new ref]         df3643cbeca9aa8191088f95c4c27c5f4239a48a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df3643c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild