$ git clone -n https://src.fedoraproject.org/rpms/rust-pango0.20.git /var/lib/mock/f45-build-43738-805/root/chroot_tmpdir/scmroot/rust-pango0.20
Cloning into '/var/lib/mock/f45-build-43738-805/root/chroot_tmpdir/scmroot/rust-pango0.20'...
$ git fetch origin 63e2b3c862599dd2778b0fddeba6f5d2b24a66f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pango0.20
 * [new ref]         63e2b3c862599dd2778b0fddeba6f5d2b24a66f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63e2b3c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild