$ git clone -n https://src.fedoraproject.org/rpms/rust-pango.git /var/lib/mock/f42-build-side-1-3588218-46943/root/chroot_tmpdir/scmroot/rust-pango
Cloning into '/var/lib/mock/f42-build-side-1-3588218-46943/root/chroot_tmpdir/scmroot/rust-pango'...
$ git fetch origin 757a14a11eb72d52dfa61211e6f2acb4e506fd1c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pango
 * [new ref]         757a14a11eb72d52dfa61211e6f2acb4e506fd1c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 757a14a Update to version 0.20.12