$ git clone -n https://src.fedoraproject.org/rpms/rust-imperative.git /var/lib/mock/f41-build-side-1-2992582-36014/root/chroot_tmpdir/scmroot/rust-imperative
Cloning into '/var/lib/mock/f41-build-side-1-2992582-36014/root/chroot_tmpdir/scmroot/rust-imperative'...
$ git fetch origin 2e4b4a3a52da09dcf8201c607db7fabc1873d085:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-imperative
 * [new ref]         2e4b4a3a52da09dcf8201c607db7fabc1873d085 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e4b4a3 Update to version 1.0.6; Fixes RHBZ#2299875