$ git clone -n https://src.fedoraproject.org/rpms/rust-human-panic.git /var/lib/mock/f40-build-2658278-66917/root/chroot_tmpdir/scmroot/rust-human-panic
Cloning into '/var/lib/mock/f40-build-2658278-66917/root/chroot_tmpdir/scmroot/rust-human-panic'...
$ git fetch origin 0cc91ea792913640116f84ba8681bcfafc275596:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-human-panic
 * [new ref]         0cc91ea792913640116f84ba8681bcfafc275596 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0cc91ea Update to version 1.2.3; Fixes RHBZ#2258007