$ git clone -n https://src.fedoraproject.org/rpms/rust-pango0.21.git /var/lib/mock/f45-build-43708-805/root/chroot_tmpdir/scmroot/rust-pango0.21
Cloning into '/var/lib/mock/f45-build-43708-805/root/chroot_tmpdir/scmroot/rust-pango0.21'...
$ git fetch origin cc636484e0ffe7856c223cc38be62c53b1b31188:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pango0.21
 * [new ref]         cc636484e0ffe7856c223cc38be62c53b1b31188 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc63648 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild