$ git clone -n https://src.fedoraproject.org/rpms/rust-assert_fs.git /var/lib/mock/f45-build-40219-769/root/chroot_tmpdir/scmroot/rust-assert_fs
Cloning into '/var/lib/mock/f45-build-40219-769/root/chroot_tmpdir/scmroot/rust-assert_fs'...
$ git fetch origin 4b54148d375715d748cd6ce33d8d797e8d76904f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-assert_fs
 * [new ref]         4b54148d375715d748cd6ce33d8d797e8d76904f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b54148 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild