$ git clone -n https://src.fedoraproject.org/rpms/rust-indexmap.git /var/lib/mock/f40-build-2268928-54750/root/chroot_tmpdir/scmroot/rust-indexmap
Cloning into '/var/lib/mock/f40-build-2268928-54750/root/chroot_tmpdir/scmroot/rust-indexmap'...
$ git fetch origin 5c444c2c0a4ddc625d69ed00c93adcf44400b213:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-indexmap
 * [new ref]         5c444c2c0a4ddc625d69ed00c93adcf44400b213 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c444c2 Update to version 2.1.0; Fixes RHBZ#2247331