$ git clone -n https://src.fedoraproject.org/rpms/vcpkg.git /var/lib/mock/f38-build-side-42-init-devel-574453-25994/root/chroot_tmpdir/scmroot/vcpkg
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-574453-25994/root/chroot_tmpdir/scmroot/vcpkg'...
$ git fetch origin 9d87d188a4ff6ac64c08f59e57474140266ec273:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vcpkg
 * [new ref]         9d87d188a4ff6ac64c08f59e57474140266ec273 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d87d18 Updated to version 2023.03.29.