$ git clone -n https://src.fedoraproject.org/rpms/rust-supports-hyperlinks.git /var/lib/mock/f38-build-side-42-init-devel-1395847-31050/root/chroot_tmpdir/scmroot/rust-supports-hyperlinks
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1395847-31050/root/chroot_tmpdir/scmroot/rust-supports-hyperlinks'...
$ git fetch origin 671d88085fbb666a45dbae324e3453785580e56e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-supports-hyperlinks
 * [new ref]         671d88085fbb666a45dbae324e3453785580e56e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 671d880 Update to version 2.1.0; Fixes RHBZ#2187843