$ git clone -n https://src.fedoraproject.org/rpms/rust-human-panic.git /var/lib/mock/f39-build-1523119-35986/root/chroot_tmpdir/scmroot/rust-human-panic
Cloning into '/var/lib/mock/f39-build-1523119-35986/root/chroot_tmpdir/scmroot/rust-human-panic'...
$ git fetch origin 5f2d75e1ded5826612b464e30e3e7c03267ade92:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-human-panic
 * [new ref]         5f2d75e1ded5826612b464e30e3e7c03267ade92 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f2d75e Update to version 1.2.1; Fixes RHBZ#2241256