$ git clone -n https://src.fedoraproject.org/rpms/rust-rangemap.git /var/lib/mock/f45-build-44274-812/root/chroot_tmpdir/scmroot/rust-rangemap
Cloning into '/var/lib/mock/f45-build-44274-812/root/chroot_tmpdir/scmroot/rust-rangemap'...
$ git fetch origin a6655cc1787249cccebe71233795042639a61823:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rangemap
 * [new ref]         a6655cc1787249cccebe71233795042639a61823 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6655cc Update to version 1.8.0; Fixes RHBZ#2515955