$ git clone -n https://src.fedoraproject.org/rpms/rust-indexmap.git /var/lib/mock/f41-build-side-1-3098641-39333/root/chroot_tmpdir/scmroot/rust-indexmap
Cloning into '/var/lib/mock/f41-build-side-1-3098641-39333/root/chroot_tmpdir/scmroot/rust-indexmap'...
$ git fetch origin 66fca11a14ecafae9f46328b142a42014ea429f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-indexmap
 * [new ref]         66fca11a14ecafae9f46328b142a42014ea429f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66fca11 Update to version 2.6.0; Fixes RHBZ#2316039