$ git clone -n https://src.fedoraproject.org/rpms/rust-libsystemd.git /var/lib/mock/f45-build-43005-799/root/chroot_tmpdir/scmroot/rust-libsystemd
Cloning into '/var/lib/mock/f45-build-43005-799/root/chroot_tmpdir/scmroot/rust-libsystemd'...
$ git fetch origin 4c3ae8da02abc6372dafdb4153fe1fae8f0ec172:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libsystemd
 * [new ref]         4c3ae8da02abc6372dafdb4153fe1fae8f0ec172 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c3ae8d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild