$ git clone -n https://src.fedoraproject.org/rpms/rust-tame-index.git /var/lib/mock/f41-build-789933-13607/root/chroot_tmpdir/scmroot/rust-tame-index
Cloning into '/var/lib/mock/f41-build-789933-13607/root/chroot_tmpdir/scmroot/rust-tame-index'...
$ git fetch origin affec5c3177c56eaf459e779cc582919567c3aa1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tame-index
 * [new ref]         affec5c3177c56eaf459e779cc582919567c3aa1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at affec5c Update to version 0.10.0; Fixes RHBZ#2248148